What is a tropical fish of the Atlantic ocean (Dutes auriga); -- called also charioteer. The name refers to a long, lashlike spine of the dorsal fin called?

coachman — (Zoöl.) A tropical fish of the Atlantic ocean (Dutes auriga); -- called also charioteer. The name refers to a long, lashlike spine of the dorsal fin. (Webster's 1913.)

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